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<p>We report that PANI-MnO₂ composites were synthesized via an in situ polymerization technique and evaluated for use in charge storage device applications. Structural and morphological analysis confirm a strong interaction between PANI and MnO₂ particles, resulting in a uniform sheet-like morphology. The incorporation of MnO₂ significantly enhanced DC conductivity at temperatures 303–393&#xa0;K, with charge transport following a three-dimensional variable range hopping (3D-VRH) mechanism. Increasing MnO₂ content synergistically improved the charge transport parameters, including hopping length, hopping energy, and density of states, despite a rise in activation energy. Further, a high specific capacitance of 345 Fg<sup>− 1</sup> at 1 Ag<sup>− 1</sup> is found at PANI-15% MnO<sub>2</sub> electrodes. The energy density of 27 Wh kg<sup>− 1</sup> is observed at 748&#xa0;W kg<sup>− 1</sup> (power density), with outstanding stability of 99.1% after 4000th charge-discharge cycles. The impedance of pristine PANI ~ 12.4 Ω to PANI-15% MnO<sub>2</sub> ~9.2 Ω of the composite is reduced, which may show a positive effect of MnO<sub>2</sub> particles and PANI for the progress of electrode material.</p>

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Structural, electrical, and electrochemical properties of polyaniline- manganese dioxide (PANI-MnO2) composites

  • 期刊论文

  • 发表日期：

    2026年5月5日

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  • Muhammad Irfan,
  • Basma A. El-Badry,
  • Nosheen kanwal,
  • Mohamed A. Salem,
  • Mohamed H. Helal,
  • Waseem Abbas

摘要

We report that PANI-MnO₂ composites were synthesized via an in situ polymerization technique and evaluated for use in charge storage device applications. Structural and morphological analysis confirm a strong interaction between PANI and MnO₂ particles, resulting in a uniform sheet-like morphology. The incorporation of MnO₂ significantly enhanced DC conductivity at temperatures 303–393 K, with charge transport following a three-dimensional variable range hopping (3D-VRH) mechanism. Increasing MnO₂ content synergistically improved the charge transport parameters, including hopping length, hopping energy, and density of states, despite a rise in activation energy. Further, a high specific capacitance of 345 Fg− 1 at 1 Ag− 1 is found at PANI-15% MnO2 electrodes. The energy density of 27 Wh kg− 1 is observed at 748 W kg− 1 (power density), with outstanding stability of 99.1% after 4000th charge-discharge cycles. The impedance of pristine PANI ~ 12.4 Ω to PANI-15% MnO2 ~9.2 Ω of the composite is reduced, which may show a positive effect of MnO2 particles and PANI for the progress of electrode material.